Determining Landscape Function and Ecosystem Dynamics: Contribution to Ecological Restoration in the Southern Namib Desert

Abstract The southern Namib is characterized by high biodiversity, changes in winter and summer rainfall, extreme climatic conditions and associated geomorphologic processes, a paucity of ecological knowledge, and multiple environmental threats posed by conflicting development options. With the long-term view to establish a research initiative focussing on restoration ecology in the southern Namib Desert, this article provides a review of current ecological knowledge and proposes potential research priorities. The aims of a research initiative would be two-fold. On the academic side, understanding processes operating at different scales will be critical to develop methods of ecological restoration suitable for southern Namib ecosystems. On the practical side, the development of appropriate methods will focus on facilitating ecological processes such as restoration of biologically active substrate, natural succession, and concentration of limited resources. The function of landscapes, plant-soil interface, soil-, vegetation- and plant population dynamics will likely provide some of the answers for ecological restoration.

[1]  P. Grubb The uncoupling of disturbance and recruitment, two kinds of seed bank, and persistence of plant populations at the regional and local scales , 1988 .

[2]  N. Jargens A new approach to the Namib Region* I: Phytogeographic subdivision , 2022 .

[3]  S. El-Darier Mineral nutrient content and turnover rate of Mesembryanthemum crystallinum in the north-western desert of Egypt , 1992 .

[4]  A. Yair Hillslope hydrology water harvesting and areal distribution of some ancient agricultural systems in the northern Negev desert , 1983 .

[5]  Mark C. Brundrett Mycorrhizas in Natural Ecosystems , 1991 .

[6]  Chris Brown The Karoo: Ecological Patterns and Processes , 2001 .

[7]  W. Stock,et al.  Plant Protection Research Institute , 1993 .

[8]  P. Desmet The vegetation and restoration potential of the arid coastal belt between Port Nolloth and Alexander Bay, Namaqualand, South Africa , 1996 .

[9]  Karen van Rheede van Oudtshoorn,et al.  Dispersal Biology of Desert Plants , 1998, Adaptations of Desert Organisms.

[10]  W. Whitford The karoo: Comparison of ecosystem processes in the Nama-karoo and other deserts , 1999 .

[11]  W. Stock,et al.  Mycorrhizal status of plants growing in the Cape Floristic Region, South Africa , 1993 .

[12]  S. Milton,et al.  The Karoo : ecological patterns and processes , 1999 .

[13]  R. Mittermeier,et al.  Biodiversity hotspots for conservation priorities , 2000, Nature.

[14]  W. Giess,et al.  A preliminary vegetation map of South West Africa , 1971 .

[15]  S. Milton Plants eaten and dispersed by adult leopard tortoises Geochelone pardalis (Reptilia: Chelonii) in the southern Karoo. , 1992 .

[16]  J. Koch,et al.  Ecological aspects of soil seed‐banks in relation to bauxite mining. I. Unmined jarrah forest , 1997 .

[17]  N. Jürgens A new approach to the Namib Region , 1991, Vegetatio.

[18]  James H. Brown,et al.  Control of a Desert-Grassland Transition by a Keystone Rodent Guild , 1990, Science.

[19]  J. Reynolds,et al.  Impact of drought on desert shrubs : Effects of seasonality and degree of resource island development , 1999 .

[20]  K. Jacobson Moisture and substrate stability determine VA-mycorrhizal fungal community distribution and structure in an arid grassland , 1997 .

[21]  A. Günster Seed bank dynamics — longevity, viability and predation of seeds of serotinous plants in the central Namib Desert , 1994 .

[22]  R. Turner Long‐Term Vegetation Change at a Fully Protected Sonoran Desert Site , 1990 .

[23]  C. Vernon The karoo: Biogeography, endemism and diversity of animals in the karoo , 1999 .

[24]  P. Nobel,et al.  Influences of root distribution and growth on predicted water uptake and interspecific competition , 1990, Oecologia.

[25]  Will Steffen,et al.  Ecosystem consequences of changing biodiversity , 1998 .

[26]  Lancaster,et al.  On the antiquity of the Namib , 1983 .

[27]  A. Günster Grass cover distribution in the central Namib— a rapid method to assess regional and local rainfall patterns of arid regions? , 1995 .

[28]  M. Allen,et al.  Natural re-establishment of vesicular-arbuscular mycorrhizae following stripmine reclamation in Wyoming. , 1980 .

[29]  J. Olivier Spatial distribution of fog in the Namib , 1995 .

[30]  R. John A sedimentation on the continental margin off the Orange river and the Namib desert , 1977 .

[31]  B. Schieferstein,et al.  Ecological investigations on lichen fields of the Central Namib , 1992, Vegetatio.

[32]  M. Seely,et al.  Survey of soil chemical properties across a landscape in the Namib Desert , 1997 .